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This is BioGuard's most effective algae preventative. Powerful surfactant/wetting agent makes Back Up able to work in tiny cracks and crevices where algae starts. Applying Back Up is STEP 3 of the BioGuard Once-a-Week 3-Step Program and the BioGuard 3-Step Program. Size: 1 QT.
- Prevents wide variety of algae growth
- Stable in sunlight
- Will not evaporate
- Will not affect pH levels
- Non-staining
- Activity increases as water temperature rises
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- Item #: 24304BIO
- Manufacturer: BioGuard
